Power supply unit



FIG. 1 is a perspective view of a power supply unit.

FIG. 2 is a front elevation view thereof. The rear elevation view is identical to the front elevation view.

FIG. 3 is a right side elevation view thereof. The left side elevation view is identical to the right side elevation view.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is an enlarged cross-sectional view taken along the line 6-6 in FIG. 4.

FIG. 7 is a perspective view thereof, shown in an environment of use; and,

FIG. 8 is a perspective view thereof, shown in a second environment of use.

The broken lines shown in the drawings illustrate portions of the power supply unit that form no part of the claimed design. 

CLAIM The ornamental design for a power supply unit, as shown and described. 